Facebook's Messenger app is about to get a lot better

Facebook CEO Mark Zuckerberg just announced Messenger Platform — which means developers will be able to build more functionality and features directly into the Messenger app.

This means you'll be able to do a lot more than just send messages within the app — you can embed media, GIFs, video clips, and even track your packages without having to exit the app.

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Here's how it works: You'd tap three dots toward the top of the screen to see which apps you can use within Facebook Messenger. You can install apps directly from within Messenger too.

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In the demo, we see Giphy being installed into the Messenger app.

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Once you choose the right GIF, you're taken directly back to your conversation.

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Another app that works with Messenger lets you customize fonts and create messages that move.

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ESPN is partnering with Facebook, too, so you can find sports clips easily and embed them into a message.

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Facebook showed off how Messenger can be used for e-commerce, too. On shopping site Everlane, you can opt to get shipping notifications directly in Facebook Messenger.

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Facebook says 40 apps will work with Messenger at launch. The announcement comes after rumors suggested Facebook was planning to expand its Messenger app to do a bunch of different things, kind of like WeChat.